Digital audio broadcast VA1010
Rev0.1
For Internal Use
Revision:0.1
copy; Copyright 2005, njg Technology Co., Ltd
All Rights Reserved
Beatles architecture
Overview
BEATLES deals with DAB/DMB digital base-band signal. The input is 10bit A/D sampled digital signal; the output is configuration information, channel status, Service Information, DAB Audio Frame and Data Stream.
Adopt Altera EP2S60F1020C4 DSP Develop Kit in beatles demo platform, which support 12bit A/D,10/100M Ethernet interface.
RF module
Future Wave
DAB FPGA Board
Ethernet
Altera development board
Figure ‑ Beatles system
Software development includes firmware of the board and application program in PC.
Adopt MicroC/OS II, LWIP in Firmware platform. For memory, it uses the SRAM/SDRAM on the development board.
Firmware architecture is shown as follows.
Figure ‑ Firmware architecture
PC application program is based on WinXP, which provide GUI, network communication, audio decoder and player.
Features
- Full compliance with ETSI EN 300 401
- Digital Audio Broadcast (DAB) full-capacity demodulator and decoder with up to 2 channels concurrent decoding capacity
- On-chip MPEG L2 Audio decoder
- FIC information available and On-chip FIB CRC
- Automatic detector for null symbol and DAB mode
- On-chip synchronization/tracking function
- Equal and unequal error protection supported
- Dynamic multiplex reconfiguration supported
- On-chip serial interface (4-wire SPI mode) to an external Man Machine Interface (MMI) amp; CPU and data receiver
- 100K logic gate count in ASIC implementation
- Automatic power saving feature
- Sharing input clock frequency with DAB RF module, 24.576 MHz
Signal list
Table ‑ Signal list of Beatles
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数字音频广播va1010
rev0.1
内部使用
修改:0.1
copy;版权2005,南京科技有限公司Ltd
保留所有权利
披头士架构
概述
披头士是DAB/DMB数字基带信号。输入的是10位A/D采样的数字信号;输出配置信息,信道状态信息、服务信息、DAB音频帧和数据流。
采用Altera公司的ep2s60f1020c4 DSP开发套件在披头士的演示平台,支持12位A/D、10/100M以太网接口。
RF模块
本波
DAB FPGA 板
以太网
Altera公司的开发板
图片1-1 披头士系统
软件开发包括主板固件和应用程序在PC.
采用该系统,在硬件平台的LWIP。内存,它使用的SRAM / SDRAM的开发板。
固件架构如下所示。
Port name |
I/O |
Width |
Type |
Pin number |
Description |
Clock Generation and management interface |
|||||
XTALI |
I |
1 |
Crystal oscillator input pin. Typically a fundamental XTAL oscillator is connected between the XIN and XOUT pins. |
||
XTALO |
O |
1 |
Crystal oscillator output pin. Typically a fundamental XTAL oscillator is connected between the XIN and XOUT pins. |
||
XVSS |
I |
1 |
Crystal oscillator power |
||
XVDD |
I |
1 |
Crystal oscillator power |
||
XIOVSS |
I |
1 |
Crystal oscillator I/O power |
||
XIOVDD |
I |
1 |
Crystal oscillator I/O power |
||
EXTCLK |
I |
1 |
Auxiliary XO external clock. An external clock can be used instead of the crystal oscillator. This pin is operational with CLKSEL is set to lsquo;1rsquo;. Typically the input clock frequency is 24.576MHz. |
||
CLKSEL |
I |
1 |
External XO clock select. When set to lsquo;1rsquo;, it selects the CLKI as a clock, otherwise the crystal oscillator is used |
||
PLL Interface |
|||||
VDDA |
I |
1 |
Analog positive supply voltage for the PLL. VDDA is typically 3.3V. |
||
VSSA |
I |
1 |
Analog ground for the PLL. |
||
Internal ADC Interface |
|||||
VINP |
I |
1 |
Differential analog input |
||
VINN |
I |
1 |
Differential analog input |
||
VCM |
I |
1 |
Voltage command mode – Voltage pull up to VINN-VINP |
||
VREFN |
I |
1 |
Differential voltage reference |
||
VREFP |
I |
1 |
Differential voltage reference |
||
VBG |
I |
1 |
Bandgap reference voltage |
||
IBEXT |
I |
1 |
Test monitoring IBIAS current for ADC |
||
AGND |
I |
1 |
Analog ground |
||
AVDD |
I |
1 |
Analog supply |
||
AGNDREF |
I |
1 |
Clean analog ground |
||
External ADC Interface |
|||||
ADC_CLK |
O |
1 |
ADC sampling clock output (8.192 MHz) |
||
ADC_D9 |
I |
1 |
ADC data input, bit 9 (MSB) |
||
ADC_D8 |
I |
1 |
应用任务 |
|||
TCP/IP堆栈 |
|||
C标准图书馆 |
ucOS-II |
||
HAL API |
|||
UART驱动 |
以太网驱动 |
披头士驱动 |
其他驱动 |
网件输入/输出子系统处理器系统硬件 |
图片 ‑固件架构
上位机应用程序是基于操作系统,提供图形用户界面,网络通信,音频解码器和播放器。
特点
- 完全符合ETSI EN 300 401
- 数字音频广播(DAB)多达2个通道并行解码能力满负荷的解调器和解码器
- MPEG音频解码芯片上的L2
- FIC的可用信息和芯片FIB CRC
- 自动检测空符号和DAB模式
- 跟踪功能的芯片同步
- 相等和不等差错保护支持
- 动态复用配置支持
- 芯片串行接口(4线SPI模式)到外部的人机界面(MMI)和CPU和数据接收
- 100K的逻辑门数在ASIC实现
- 自动省电功能
- DAB射频模块共享的输入时钟频率,24.576兆赫
信号列表
表‑ 披头士信号表
端口名称 |
I/O |
宽度 |
类型 |
针数 |
描述 |
时钟生成与管理接口 |
|||||
XTALI |
I |
1 |
晶体振荡器输入引脚。通常是一个基本的XTAL振荡器连接之间的新和XOUT引脚。 |
||
XTALO |
O |
1 |
晶体振荡器输出引脚。通常是一个基本的XTAL振荡器连接之间的新和XOUT引脚。 |
||
XVSS |
I |
1 |
晶体振荡器的功率 |
||
XVDD |
I |
1 |
晶体振荡器的功率 |
||
XIOVSS |
I |
1 |
晶体振荡器输入输出功率 |
||
XIOVDD |
I |
1 |
晶体振荡器输入输出功率 |
||
EXTCLK |
I |
1 |
辅助外部时钟。一个外部时钟可以用来代替晶体振荡器。这是操作CLKSEL引脚被设置为“1”。典型的输入时钟频率24.576mhz。 |
||
CLKSEL |
I |
1 |
外部XO时钟选择。当设置为“1”,选择clki作为时钟,否则用晶体振荡器 |
||
锁相环接口 |
|||||
VDDA |
I |
1 |
模拟正电源电压的PLL。VDDA是典型的3.3。 |
||
VSSA |
I |
1 |
模拟地面的PLL。 |
||
内部ADC接口 |
|||||
VINP |
I |
1 |
差分模拟输入 |
||
VINN |
I |
1 |
差分模拟输入 |
||
VCM |
I |
1 |
电压命令模式–电压拉到vinn-vinp |
||
VREFN |
I |
1 |
差分基准电压 |
||
VREFP |
I |
1 |
差分基准电压 |
||
VBG |
I |
1 |
带隙基准电压 |
||
IBEXT |
I |
1 |
试验监测伊维亚斯电流ADC |
||
AGND |
I |
1 |
模拟地 |
||
AVDD |
I |
1 |
模拟电源 |
||
AGNDREF |
I |
1 |
干净的地面模拟 |
||
外部接口 |
|||||
ADC_CLK |
O |
1 |
ADC采样时钟输出(8.192兆赫) |
||
ADC_D9 |
I |
1 |
ADC的数据输入,9位(MSB) |
||
ADC_D8 |
I |
1 |
ADC数据输入,位8 |
||
ADC_D7 |
I |
1 |
ADC数据输入,位7 |
||
ADC_D6 |
I |
1 |
ADC数据输入,位6 |
||
ADC_D5 |
I |
1 |
ADC数据输入,位5 |
||
ADC_D4 |
I |
1 |
ADC数据输入,位4 |
||
ADC_D3 |
I |
1 |
ADC数据输入,位3 |
||
ADC_D2 |
I |
1 |
ADC数据输入,位2 |
||
ADC_D1 |
I |
1 |
ADC数据输入,位1 |
||
ADC_D0 |
I |
1 |
ADC数据输入,位0 (LSB) |
||
外部存储器接口 |
|||||
DATA_EXI |
O |
8 |
外部SRAM数据输入 |
||
DATA_EXO |
I |
8 |
外部SRAM数据输出 |
||
ADDR_EX |
O |
20 |
外部SRAM地址总线 |
||
NWR_EX |
O |
1 |
外部SRAM写选通 |
||
NRD_EX |
O |
1 |
外部SRAM读选通 |
||
NCS_EX |
O |
1 |
外部SRAM芯片选择 |
||
自动增益控制接口 |
|||||
W_AGC |
O |
1 |
lt;
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